Q.

Phenotypic expression of phenylketonuria includesA. Mental retardationB. Reduction in hairC. Reduction in skin pigmentation.

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a

A and B

b

A and C

c

A, B and C

d

B and C

answer is C.

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Detailed Solution

Phenylketonuria is an example for pleiotropy. A single gene influences more than one phenotypes is known as pleiotropy. Phenotypic expression of this disease includes mental retardation, reduction in hair and skin pigmentation.
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